package com.atguigu.netty.tcp;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;

import java.nio.charset.Charset;
import java.util.UUID;


/**
 * @author: 叶子
 * @date: 2022/04/04 21:21
 **/
public class MyServerHandler extends SimpleChannelInboundHandler<ByteBuf> {
    private int count;

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) throws Exception {
        byte[] buffer = new byte[msg.readableBytes()];
        msg.readBytes(buffer);
        //将buffer 转成字符串
        String message = new String(buffer, Charset.forName("utf-8"));
        System.out.println("服务器接收到数据:" + message);
        System.out.println("服务器接收的消息量=" + (++this.count));
        //服务器回送数据给客户端，回送一个随机id
        ByteBuf responseByteBuf = Unpooled.copiedBuffer(UUID.randomUUID().toString()+" ", Charset.forName("utf-8"));
        ctx.writeAndFlush(responseByteBuf);

    }
}